I found it a bit strange, the fact that although our forefathers - Abraham, Itzhok, Yaacov, and down to Moyshe Rabeynu were all prophets, as Hashem explicitly spoke to them, they did not consult, or tried to consult Hashem for explaining them a proper way of conduct in numerous conflict situations: Abraham didn't know what to do with Ishmael, Itzhok didn't know how to properly treat Eisov, Yaakov didn't know exactly what to do with his wives and his kids, especially Yosef problem, 10 brothers treated Yossef wrongly and he treated them back ... Moses has a lot of conflict situations (like the Golden Calf) and never consulted Hashem before judging.
NB. This question is about a general pattern in the whole Tanakh, not trying to find a different case here or there.